ENHANCED STABILITY FILTER INTEGRITY TEST

• Main Authors: GIGLIA SALVATORE, DAVID NHIEM
• Format: Patent
• Language: English; Japanese
• Published: 17.09.2020
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To provide an integrity test method for filters that allows the use of relatively slow permeate gas pairs, but does not require excessive test times and minimizes or eliminates the risk of drying out the filters during the test.SOLUTION: A method of integrity-testing a porous material comprises: providing a porous material to be tested, the porous material having a first surface and a second surface; wetting the porous material with a wetting liquid; providing a gas stream comprising at least first and second gases humidified with the wetting liquid to the saturation vapor pressure of the wetting liquid or the vicinity thereof; applying a vacuum to the permeate stream exiting the second surface of the porous material; introducing the gas stream to the first surface of the porous material; causing the first and second gases to flow through the porous material; measuring the concentration of at least one of the first and second gases in the permeate stream exiting the second surface of the porous material; and comparing the measured concentration to a predetermined concentration; where a difference between the measured concentration and the predetermined concentration is indicative of the porous material being non-integral.SELECTED DRAWING: None 【課題】比較的遅い透過ガス対の使用を可能にするが、過度の試験時間を必要とせず、試験中にフィルタが乾燥する危険性を最小限に抑える又は排除するフィルタの完全性試験方法の提供。【解決手段】この課題は、多孔質材料の完全性試験の方法であって、試験される多孔質材料を準備し、前記多孔質材料は、第１表面と第２表面とを有し、前記多孔質材料を湿潤用液体で湿潤させ、前記湿潤用液体により前記湿潤用液体の飽和蒸気圧又はその付近に加湿された少なくとも第１ガス及び第２ガスを含むガス流を準備し、前記多孔質材料の前記第２表面を出る透過流に真空を加え、前記ガス流を前記多孔質材料の前記第１表面に導入し、前記第１ガス及び前記第２ガスを前記多孔質材料に通し、前記多孔質材料の前記第２表面を出る前記透過流における前記第１ガス及び前記第２ガスの少なくとも一方の濃度を測定し、及び前記測定された濃度を所定の濃度と比較することを含み、前記測定された濃度と前記所定の濃度の差異は、前記多孔質材料が不完全であることを示す方法によって解決される。【選択図】なし